Typewriting machine



y 1931- R. voN REPPERT TYPEWRITING MACHINE Filed Sept. 11, 1928 2Sheets-Sheet 1 y 1931- R. VON REPPERT 1,803,573

TYPEWRITING MACHINE Filed Sept. 11, 1928 2 Sheets-Sheet 2 Patented May5, 1931 "UNITED- STATES PATENT OFFICE} RICHARD VON REPI 'ERT, OFHARTFORD, CONNECTICUT, ASSIGNOR TO UNDERWOOD ELLIOTT FISHER'COMPANY, OFNEW YORK, N Y., A CORPORATION OF DELAWARE TYPEWRITING MACHINEApplication filed September-11, 1928. Serial No. 305,175.

This invention relates to a power-driven type-action for typewriting andcomputing machines which is initiated by the depression ofa key.

In this invention the power-driven typeaction is controlledmechanically, wherein the depression of a key releases a latch which iscarried by a pressure lever. The latter, through spring tension, forcesa wedge-llke 1o interponent into engagement with a powercylinder, which,through frictlon, actuates the type-bar to strike against the platen,

whereby the pressure on the key need not be directly transmitted tocause the frictional engagement. As no direct key-pressure 1s needed foroperating the type-bars, a very light pressure on the keys issufficient. This relieves the operator from strain, While at the sametime a blow of the desired force may be obtained to cause a properimprint on a work-sheet.

A feature of this invention lies in the speed with which the keys mayrelease associated members to actuate the type-bars.

Another feature is the use of means, whereby, when a key is depressed,an inadvertent second pressure on said key does not cause an error intyping or computing.

A feature of this invention lies in the use of a constantly-drivencylinder or power device having numerous circumferential grippinggrooves corresponding with a set of keycontrolled wedge-sha edinterponents, which are caused by the keys to drop into the grooves, andwhich are hence set in motion by the cylinder, their motions being dulytransmitted to the type-bars. Through said grooves and wedges africtional coupling is obtained, whichis well adapted to operate typingand computing mechanisms. The desired friction is obtained by using asharp angle in the grooves, and'by applying pressure to the wedge-shapedinterponents. According to the invention the engaging pressure of thewedges is supplied by a springactuated member which is merely releasedby the keys and automatically reset by the power devices. By these meansthe-power device supplies the force necessary to operate the typewritingdevices and the keys have merelya selecting function and thereforerequire a light and short stroke.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a vertical section through a typewriting machine, and showsthis invention applied thereto.

Figure 2 is a perspective view of this invention, with some parts brokenaway or omitted.

Figure 3 is a partial vertical section through Figure 1, as viewed fromthe front.

Figure 4 is a detail .view, showing the component parts of'apower-cylinder.

Figure 5 is a detail view of the releasing and resetting members aspositioned at the completion of the downward thrust of the pendant.

Figure 6 is a detail view, showing a. typebar about to strike theplaten, and the triplever about to be released to reset apressurelever.

Referring to the drawings, the keys 10 have key-levers 11, which arefulcrumed on a shaft 12, carried by the main frame 13 of a type writershown partly in outline. The keylevers are extended to form overhangs14, connected by contractile springs 15, to a channel-piece 16, which isattached by screws 17 to lugs 18, formed on said main frame. The keylevers 11 have dependent arms 20, formed with stops 21, seats or latches22, faces 23 and ears 24, and also have pins 25.

Pivotally attached to the ears 24 by studs or screws 26, are stepping orlatching levers 27 having stop-arms 28, latching seats 29 and faces 30.The dependent arms 20 and the stepping levers 27 are connected bycontractile springs 31. The key-levers are separated by spacers 32, andare held against endwise movement by collars 33, which are attached bypins or set screws to the shaft 12.

Engageable by the dependent arms 20 and the steppin levers 27, arelatches 34, which are formed rom, or are attached to, pressure levers35. The latter are pivotally mounted on a shaft 36, which is pinned inbossed 0n the mainframe 13. The pressure-levers are separated on saidshaft by spacers 37, and

are positioned as a unit through collars 38, which are held by setscrews.

The free ends of the pressure-levers 35 are under tension of attachedsprings 39. The

latter also are hooked to an angle-bar 40,

which is attached to lugs on the main frame 13, by suitable screws. Thepressure-levers 35 have short arms 42 that carry rollers 43, which areattached to said levers by studs 44. A roller 43 can engage one edge ofa device or pendant 45, which has an opposite edge formed into a wedge46. The pendants arepivotally hung on studs or screws 47, car ried bymain levers 48. The latter, at their forward ends, slide in, and areguided by, slots 19 out into the channel-piece 16 to form a comb. Attheir other ends the main levers are fulcrumed at 49, and are held innormal raised position by springs 50, supported on the main frame.

When depressed, the main levers 48 will actuate bell-cranks 51, to swingtype-bars 52 up and away from a rest 53, and to strike a platen 54. Thelatter is carried by a shaft 55 jour naled in a usual carriage 56, whichrides on rails 57 that are supported on the main frame. A universal bar58 is actuated by the typebars 52, to operate a usualescapement-mechanism 59, which co-operates with common carriage-feedingmembers 60.

Rearward actuation of the pendants 45 causes their wedges 46 to engagethe beveled sides of disks 61, which are equidistantly separated byspacers 62. Said disks and spacers are assembled on the large diameter63 of a turned-down driving shaft 64, which is provided with projectingright hand, or right and left hand, threads 65. Said large diameter hasa key-channel 66, through which said disks are kept from rotating. Thismay be done through a key formed on each disk to engage the key-channel,or by a usual key which is common to both the key-channel and to a slotcut through each disk.

The disks 61 and spacers 62 are held together and positionedlongitudinally in cylindrical form by end washers 67 held by nuts 68.One end of said driving shaft 64 is journaled in a bushed boss formed onone side of the main frame. Another support of said shaft 64 is abushing 69, which is threaded into another boss on the main frame. Thedriving shaft 64 is held in its bearings by collars 70, which areprovided with set screws. The disks and spacers, when assembled, formannular grooves 71.

One end of the driving shaft is connected to a worm-gear 72, rotated bya worm 73, which is driven by a motor 74. The worm-drive is enclosed ina gear-case 75, which, together with the motor, is bolted to the mainframe 13. The speed of the driving shaft is governed by the ratio of theworm-drive, and also by the R. P. M. of the motor. The latter may have acommon variable-speed control.

When the motor has been started and the above-described machine is to beoperated, the parts will normally lie as shown in Figure 1. When a keyis depressed, the key-lever swings its associated dependent arm 20, andslides the seat 22 from under the latch 34. The latter, through thepressure-lever 35 and the spring 39, Wlll then be pulled down betweenthe faces 23 and 30. This downward movement of said latch and leverswings the roller 43 to engage the pendant 45, and to press the wedge 46into one of the grooves 71. The pendant, through its frictionalengagement, will then be pulled down, and will actuate a main lever 48to swing the type-bar up and against the platen. Before the typebarstrikes the platen, the parts will assume the relative positions shownin Figure 6.

As stated, a pendant is frictionally coupled and power actuated uponrelease of the respective key and to disconnect the pendant, adisconnecting and resetting device for the pressure-lever is provided.

The nether edge of the pressure-lever is developed into a cam arrangedto be engaged by a roll 100 on an arm 99 of a rocker 93 and the rockeris held in normal position by a spring 95 secured to an arm 94 of saidrocker and to the angle-bar 40. The foot of each pendant 45 engages alever 78 journaled on the transverse shaft 80 which is mounted in bosseson the main frame and a spring 81 connects the lever 78 with the arm 92on the rocker 93 formed with a hub 98 to rock upon a shaft 103 so thatmovement is transmitted from the pendant to the rocker through thespring 81. Normally, the parts are in the position shown in Figure 1,with the lever 78 against a stop 82, common to all the levers 78, and inthis position the rocker 93 is locked against movement by the lever v 85engaging the lock surface 91 with the arm 92 of the rocker. The opposedarm 87 of the lever 85 has a cam surface adapted to be engaged by a pin84 on the lever 78 and a sprin 89 1s connected to a pin 88 on the lever78 an to a transverse bar 90 and holds the lever in normal position.

The downward movement of the pendant will tension the comparativelystrong spring 81 connecting the lever 78 with the rocker 93, and whenparts have assumed the position shown in Figure 6, the pin 84 on thelever 78 touches the cam surface on the lock lever 85 and is ready torock the lever about its shaft 86 to thereby release the rocker 93.

U on a limited additional movement of the pen ant, the parts will assumethe position shown in Figure 5 and in this position the pin 84 hasactuated the lever 85 and has released the rocker 93, which, through thetension of the spring 81, has instantly moved to actuated position. Thismovement of the rocker 93 causes the roll 100 on the arm 99 thereof, toactuate the cam edge on the pressure-lever35,

thereb raisin the -pressure-lever toa posikey-lever will osition itselfunder the latch.

34, and shortly fore the key re-assumes normal positin,the step inglever will be disengaged entirely from t e latch 34 and the latch willdrop onto the seat of the key-lever under the impulse of the spring 39and the parts will assume normal position. In Figure 1 the face 30 abutsthe side of th latch 34because the seat 22 is lower than the seat 29.This permits the latch to drop when the seat 22 is withdrawn. As soon asa ke ed down, the engagement between the latch and the face 23 willprevent the key from rising to normal position. While so locked aninadvertent second pressure on the ke would not cause an error intyping, because t e typebar will be automatically actuated but oncebetween the depression and release of a key. The depression of thelatter is limited when the stops 21 abut the channel-piece 16. Thelatter serves a four-fold purpose,namely, it acts as a stop for thekeys, it functions as an anchorage for the springs 15, and also bothguides and stops the main levers 48.

The spring 81 performs dual functions. First, as shown in Figure 6, itis expanded to all down the arm 92 when released by the atch-lever 85.After suchrelease, the spring 81 contracts, and the parts assume thepositions shown in Figure 5. During the resto ration of the parts to thepositions shown in Figure 1, the spring 81 merely acts as a link. Suchfunction of the spring 81 is possible through its having a greatertension than the correlative spring 95. 1

When the disks 61 and spacers 62 have been assembled and fixed on theshaft 64, the whole constitutes a power-cylinder having grooves 71.Should the latter become worn to the point of slippage, the disks can bereplaced. The grooves register with the'pendants 45 carried by the mainlevers 48, which are equidistantly spaced in the slots 19. The rollers43 are reglstered with said pendants, while the latches 34 on theassociated pressure levers 35 will register with members 20 and 27,which are connected to the keys.

With the construction shown, wherein all the key-levers have a commonfulcrum, there will be four series of said levers, each series having adifferent length. If all the keys are depressed the same distance, thelonger keylevers will not swing the dependent arms through as great'anarc as willthe shorter key-levers. If not swung far enough, the de-' Thelast-mentioned ossibility is overcome by lproviding four series ofdependent arms, eac series having a different length of seats 22, theshortest seats functioning with the longest key-levers. Anotherprovision is four different lengths of stops 21, to maintain the samedepressed key-travel for the different lengths of key-levers. In thiscase the longest levers have sto s which project the y a separate frame,which could then be adhas been depressed and the latch 34 has start-vjustably attached to said main frame.

This invention as illustrated is applied to a typewriter. It is equallyapplicable, and more advantageous, when used with a combined typewriting'and computing machine. For such purposes connections are made from themain levers of the digit-ke s to a. totalizer or indexing mechanism. orthese reasons it is not desired to limit this invention to theconstruction shown.

In providing for frictional engagement between the pendants andpower-cylinder, the angle of the bevels is a feature of importance, and,in the design shown, the opposed walls of the friction groove are at anangle of about twelve to fifteen degrees to each other.

The grooves are hardened to a somewhat softer degree than are thependants or interponents and any slight slippage between the two willresult in a uniform wear on the rotating power-cylinder rather than agrinding off of one area on the interponent. This insures continuedsmooth engagement surfaces, so that there is neither lag nor jerk whenfriction is applied.

It will be seen that when a key isdepremed, a seat on an associated armis' swung out from under a latch and releases the same. The latch formspart of a pressure-lever, which is pulled down by a spring whenreleased. The pressure-lever has a free arm at right angles thereto,carrying a roller, which is thereupon swung rearwardly. The rollerengages the front edge of an interponentmember having a rear edge formedinto a wedge. This interponent-member is pivotally suspended on a mainlever connected to the type-bar and computing mechanism.

The interponent-member is swung rearwardly by the roller, and the wedgeengages one of a series of V-shaped grooves in a power-driven andnormally-rotating cylinder. The latter, when so engaged constitutes aclutch, which, through friction, rolls down the interponent-member todepress the main lever, and thereby actuates the type-bar and computinmechanism.

Just be ore the type-bar strikes the platen, which it does throughmomentum, the downwardly-traveling interponent-member is released fromthe clutch. This release 1s accomplished through a swin able lever,which underlies and is spring-he against the interponent-member. As thelatter approaches a predetermined releasing position, the leverapproaches the limit of its downward swing. As said lever swings, italso swings a pin carried thereon. The pin traverses a cam on the lowerend of an oscillatable latch-lever, which is swung thereby.

Through the aforesaid cam the upper end of the latch-lever 85 is swungfree from beneath the arm 92 carried by the rocker 93. Said arm 92 isthen pulled down and toward the lever by the connecting spring 81. Thismovement of the rocker raises the attached roll 100 which, in turn,raises the springpulled end of the pressure-lever. The latch on thelatter is caught and held in raised position on the seat of a steppinglever pilgoted on the arm associated with the key. e arm and thestepping lever are for this purpose connected by a spring. As thepressurelever, which carries the latch, is raised, the attached rolleris actuated out of engagement with the interponent-member. The wedge onthe latter thereupon ceases to have frictional engagement with thegroove in the cylinder, and the interponent-member is raised to normalposition. This is done by the spring which restores the main lever,after its associated type-bar has struck the platen.

As the inter onent-member rises, the abutting lever 78 egins to risethrough spring tension 81. The pin carried by the lever then retraversesthe cam on the latch-lever, which has its lower end pulled rearwardly bya spring. The spring that resets the lever also rotates the rocker. Thismovement swings the roll-arm down and away from the pressure-lever. Thearm 92 on the rocker rides up the front of the latch-lever, until theupper end of the latter is snapped under said arm. While the aboveactuating or resetting members are functioning, the key is held indepressed position, either by the operators finger or by engagement ofthe associated arm with the side of the latch. As the key is released itis spring-pulled so that its associated seat may first underlie thelatch. As the upward key movement continues, the seat of the steppinglever is actuated by a sto on its supporting arm until its seat slidesom under the latch. The released latch then drops slightly onto the seatof said associated arm, where it is held until the key is againdepressed.

A very slight rearward movement of the wedge is necessary for engagementwith the groove, so that the pressure-lever travels but a short distancebetween latched and unlatched positions. As the interponent-memmeans.This is done through the accumulated tension in the spring connectingthe rocker,

which instantly resets the latch, and permits the interponent-member torise.

Variations may be resorted to within the scope of the invention, andportions of the im-- provements may be used without'others.

Having thus described my invention, I claim:

1. A typewriter havin the combination of a universal continuousy-rotatin friction clutch-member, type-bars, indivi ual frictionclutch-members connected to the typebars, normally inoperativepressure-arms effective when released to press the individualclutch-members into engagement with the universal clutch-member, tofrictionally transmit typing movements to the type-bars, keys havingmeans to selectively release said pressure-arms, means for restoringsaid pressure-arms, and means operable by the typing swing of thetype-bars and effective to store up energy in the pressure-arm-restoringmeans, said restoring means being automatically released near thecompletion of the typing stroke for the purpose of discontinuing theindividual clutch-member pressure independently of the actuated key.

2. In a typewriting machine, the combination of a universalcontinuously-rotating frictional driving member, a type-bar,typebar-driving devices engageable individually with the rotatingmember, a member for causing said driving device to engage said rotatingmember frictionally, a spring tending to operate said engaging member, alatch for normally restraining said engaging mem bar, a key, means toenable the key to release said engaging member to swing the drivingdevice into a frictional engagement with the rotating member, andmaintain a frictional pressure between the driving device and therotating member until the type-bar is actuated, and individualconnections driven by the individual type-bar-driving devices, and eacheffective to set up an individual restoring power to re-latch saidengaging member, said restoring power being subsequently released by thefinal portion of the power stroke ofthe type-bar-driving device.

3. A typewriter having the combination of a universalcontinuously-rotating friction clutch-member, type-bars, individualclutchmembers connected to the type-bars, springactuated pressuremembers to connect the individual clutch-members with the universalclutch-member, to thereby transmit typing movement to the type-bars,keys operative to release the selected pressure members to induceclutching engagement of the respective individual clutch-members withthe universal Lsoasvs set at tension during the typing stroke thereofand released upon or near completion of the typingl stroke to reset thepressure members and t ereby release the individual-clutchmembers andthe type-bars associated therewith for resetting movement.

4. A typewriter having the combination of a universalcontinuously-rotating friction clutch-member, type-bars, keys havmgarms, individual friction clutch-members connected to the type-bars,spring-actuated pressure members normally held out of engagement, withthe individual clutch-membersby the arms on the keys, and operative toconnect the individual clutch-members with the universal clutch-member,to thereby transmit typing movement to the type-bars, the keys operativeto release the selected pressure members for inducing clutching engaement, and springs connected to the typears to store up energy duringthe typing movement and release thls energy upon or near completion ofthe typing stroke for the ur ose of restorin the type-bars andindividual clutch-mem ers, when the latter are released from theuniversal clutch-member.

5. A typewriter having the combination of a universalcontinuously-rotating friction clutch-member, type-bars, keys havingarms, individual friction clutch-members connected to the t pe-bars, andspring-actuated ressure mem ers normally held 1n unforce engagement withthe individual clutch-members by the arms on the keys, and operativewhen released to connect the rotatmg and individual clutch-members thepressure members having latches, t e arms having seats to engage thelatches through spring pressure, and the seats swingable to release thelatches upon depression of the keys, to thereby transmit typing movementto the type-bars through the spring tension of the pressure members,which causes frictional engagement between the individual and rotatmgclutch-members.

6. A typewriter having the combination of a universalcontinuously-rotating friction clutch-member type-bars, keys havingarms, individual fllCtlOIl clutch-members connected to the t e-bars, andspring-actuated ressure mem ers normally held in unorced engagement withthe individual clutch-members by the arms on the keys, and operativewhen released by the keys to connect the rotating and individualclutch-members, the ressure members having latches, the arms aving seatsto engage the latches through sprin pressure, the seats swingable torelease the atches upon depression of the keys, the keys having leversof various lengths, and the seats being of different lengths whereby thesame downward travel of the keys will always release the latches whenthe arms of the keys are swung through arcs of various degrees.

7 In a typewritm machine, the combinatlon of a universacontinuously-rotat' fr1 ct1 on clutch-member, type-bars, lndividuafr1ct1on clutch-members, connected to the type-bars, keys havinglatching arms,

spring-actuated pressuremembers having latches engageable by the arms tonormally hold the pressure-members out of en agement with the individualclutch-me rs, sa1d pressure-members when released by the keys operatlveto connect both clutch-members, rockers having means for restoring thekey-released pressure-members, levers normally efiective to latch therocking means and each lever having a cam, arms depress1ble by each"individual clutch-member and each arm having a stud, and arocker-actuating sprmg connected to and flexed by the depresslon of eacharm, each stud eble with the cam of a latching lever to vibrate saidlever and unlatch a rocking means to its tensioned spring and restorethe pressuremember to the control ofits key.

8. In a typewritin machine, the combinat1on of a universacontinuously-rotating friction clutch-member type-bars, individualfriction clutch-members, connected to the type-bars, keys havinglatching arms, spring-actuated pressure-members having latchesengageable by the arms to normally hold the pressure-members out of enage-.

ment with the individual clutch-mem ers, said pressure-members whenreleased by the keys operative to connect both clutch-members, rockershaving means for restoring the key-released pressure-members, leversnor- -mally effective to latch the rocking means and each lever having acam arms depressible by each individual clutch-member and each armhaving a stud, a rocker-actuating spring connected to and flexed by thedepresslon of each arm, each stud engageable with the cam of a latchinglever to vibrate said lever and unlatch a rocking means to its tensionedspring and restore the pressuremember to the control of its key, and astop on the machine, the downward swing of each stud-arm being limitedby the throw of its individual clutch-member and the return of eachstud-arm by its spring being limited by said stop.

9. A typewriter havin the combination of a universal continuousy-rotating friction clutch-member, type-bars, individual frictionclutch-members connected to the typebars, keys having latch-arms,spring-actuated pressure-members having latches releasable by thelatch-arms to permit the pressuremembers to connect the twoclutch-members when the keys are depressed and. thereby actuate theindividual clutch-members to type, a spring-pressed arm having a stud, aspring-actuated rocker for each pressure member from its individualclutch-member to lease the latter from frictional engagement with therotating clutch-member, and thereby permit the individual clutch-memberto be restored.

10. In a typewriting machine, the combination of a universalcontinuously-rotating friction clutch-member, type-bars, individualfriction clutch-members, connected to the type-bars, keys havinglatching arms, spring-actuated pressure-members having latchesengageable by the arms to normally hold the pressure-members out ofengagement with the individual clutch-members, said pressure-memberswhen released by the keys operative to connect both clutch-members,rockers having means for restoring the key-released pressure-members,levers normally eifective to latch the rocking means and each leverhaving a cam, arms depressible by each individual clutch-member and eacharm having a stud, a rocker-actuating spring connected to and flexed bythe depression of each arm, each stud engageable with the cam of alatching lever to vibrate said lever and unlatch a rocking means to itstensioned spring and restore the pressuremember to the control of itskey, and a stepping lever pivotally mounted on said arm of each key andhaving means to engage the latch of the restored pressure-member to holdsaid restored member until the actuated key is released. I

11. In a typewriting machine, the combination of a universalcontinuously-rotating friction clutch-member, type-bars, individualfriction clutch-members, connected to the type-bars, keys havinglatching arms, sprlngactuated pressure-members having latches engeableby'the arms to normally hold the pressure-members out of engagement withthe individual clutch-members, said pressuremembers when released by thekeys operative to connect both clutch-members, rockers having means forrestoring the key-released presure-members, levers normally effective tolatch the rocking means and each lever having a cam, arms depressible byeach individual clutch-member and each arm having a stud, arocker-actuating spring connected to and flexed by the depression ofeach arm, each stud engageable with the cam of a latching lever tovibrate said lever and unlatch a rocking means to its tensioned springand restore the pressure member to the control of its key, a steppinglever pivotally mounted on engage the latch of the-restored said arm ofeach key and having means to ressuremember to hold said restored mem eruntil the actuated key is released, and a stop on the arm of each key,said stop on the arm of the actuated key effective to rock its steppinglever holding the restored presure-member,

to release said member by releasing its latch {:0 be rearrested by therestored arm of the icy.

12. A typewriter having the combination of a universalcontinuously-rotating friction clutch-member, type-bars, type-baroperating levers, individual clutch-members connected to said levers,spring-actuated pressure members operative to connect the rotating andindividual clutch-members to depress the latter, keys having leversoperative to release and engage said pressure members, a cross-bar,springs for the key-levers anchored to the cross-bar to restoredepressed keys when released, stops on the key-lcvers to abut thecross-bar when the keys are depressed, and slots in the cross-bar toguide the type-bar levers, the bottoms of said slots also acting asstops to limit the downward travel of the type-bar levers.

13. A typewriter having the combination of a universalcontinuously-rotating friction clutch-member, type-bars, individualfriction clutch-members connected to the type-bars, spring-actuatedpressure members having latches, and keys having arms, the arms havingseats to intermittently underlie the latches, the arms carrying pivotalstepping levers pulled toward the arms by springs, the arms swingable bythe depression of the keys to release the downwardly-spring-actuatedpressure members, the stepping levers acting to underlie the latcheswhen the latter are raised, the latches never lying below the verticalengaging surfaces of said arms and stepping levers, whereby saidpressure members can always be raised between said vertical enlgagingsurfaces, and whereby, after the eys have been depressed, and should theoperators finger be removed they are held in depressed position throughthe abutment of their vertical engaging surfaces with the sides of saidlatches until the latter are autmotically raised above the seats on saidarms, to permit the keys to be restored through their springs.

14. In a machine of the class described, the combination of typingdevices, levers for driving thetyping devices, pendants on said levers,a power-driven roller with which said pendants are frictionallyengageable, keys separated from the typing-device-driving levers, and atrain of mechanism intermediate each key and each pendant operable whena key is depressed to shift said pendant into frictional engagement withthe powerroller for a t ing-device-driving reciprocatlon, each tram ofmechanism including a iao pressure-lever, a spring to tension saidpressure-lever, a latch-lever for holding said pressure-lever at atensioned position, a connection between the latch-lever and a key, anda disk rotatably mounted on the pressure-1ever and engageable with thependant.

15. In a machine of the class described, the

combination with a constantly rotating roller, a typing device, a leverfor driving said typing device, a key disconnected from saidtype-driving lever, a normally disengaged pendant mounted on saidtype-driving lever and frictionally engageable with the rotating roller,to enable the roller to drive the pendant and typing device by frictionwith the pendant, and a pendant-controlling lever having meansengageable with said pendant to swing the pendant into engagement withthe rotating roller to be reciprocated thereby and drive the typingdevice, of mechanism to enable the key to operate thependant-controlling lever and force the pendant into a frictionalengagement with the roller by the depression of the key.

16. In a machine of the class described, the combination with aconstantly rotating roller, a typing device, a lever for driving saidtyping device, a key disconnected from said type-driving lever, anormally disengaged pendant mounted on said type-driving lever andfrictionally engageable with the rotating roller, to enable the rollerto drive the pendant and typing device by friction with the pendant, anda pendant-controlling lever having means engageable with said pendant toswing the pendant into engagement with the rotating roller to bereciprocated thereby and drive the typing device, of intermediatemechanism connected to the key, and connectible with thependant-controlling lever to set up a type-device driving pressurebetween the pendant and the rotating roller. I

RICHARD VON REPPERT.

